Hierarchical Polymer Microlattice Structures

Doty, Robert E.; Kolodziejska, Joanna A.; Jacobsen, Alan J.

doi:10.1002/adem.201200007

Cited by 15 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, larger thicknesses could also be fabricated by exposing the photopolymer to the 2D mask at different heights, which results in multiple layers akin to that of layer‐by‐layer fabrication in conventional 3D printing methods. SPPW has been shown to be able to fabricate lattices out of stiff, viscoelastic, and pre‐ceramic polymers . One main advantage of SPPW compared to other 3D printing methods is the ability to fabricate 3D structures at a substantially higher rate (>1 m 2 min −1 for continuous process) and scalability (fabrication area ≈0.4 m 2 ).…”

Section: Fabrication Methods: Advantages and Challengesmentioning

confidence: 99%

Mechanical Metamaterials and Their Engineering Applications

et al. 2019

View full text Add to dashboard Cite

In the past decade, mechanical metamaterials have garnered increasing attention owing to its novel design principles which combine the concept of hierarchical architecture with material size effects at micro/nanoscale. This strategy is demonstrated to exhibit superior mechanical performance that allows us to colonize unexplored regions in the material property space, including ultrahigh strength-to-density ratios, extraordinary resilience, and energy absorption capabilities with brittle constituents. In the recent years, metamaterials with unprecedented mechanical behaviors such as negative Poisson's ratio, twisting under uniaxial forces, and negative thermal expansion are also realized. This paves a new pathway for a wide variety of multifunctional applications, for example, in energy storage, biomedical, acoustics, photonics, and thermal management. Herein, the fundamental scientific theories behind this class of novel metamaterials, along with their fabrication techniques and potential engineering applications beyond mechanics are reviewed. Explored examples include the recent progresses for both mechanical and functional applications. Finally, the current challenges and future developments in this emerging field is discussed as well.

show abstract

Section: Fabrication Methods: Advantages and Challengesmentioning

confidence: 99%

Mechanical Metamaterials and Their Engineering Applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…On one hand, they have opened up new areas of the material property space. This, in addition to evolving 3D printing techniques that enable their manufacturing, have motivated researchers to explore a variety of architectures (Schaedler and Carter, 2016) ranging from lattice topologies (Gibson and Ashby, 1997;Deshpande et al, 2001b;Luxner et al, 2004;Moongkhamklang et al, 2010;Vigliotti and Pasini, 2012;Zheng et al, 2014), foam-like metamaterials (Berger et al, 2017) triply periodic minimal surface geometries (Wang et al, 2011;Dalaq et al, 2016), hierarchical structures (Doty et al, 2012;Meza et al, 2015), honeycomb structures (Gibson and Ashby, 1997;Wadley, 2006;Fleck et al, 2010), and woven topologies (Erdeniz et al, 2015;Ryan et al, 2015;Zhang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

On the Interrelationship Between Static and Vibration Mitigation Properties of Architected Metastructures

Arretche

Matlack

2018

Front. Mater.

View full text Add to dashboard Cite

Continuous demand for improvement of material performance in structural applications pushes the need for materials that are able to fulfill multiple functions. Extensive work on effective static properties of different architected materials have shown their ability to push the modulus-density design space, in terms of high effective moduli at low relative density. On the other hand, variations in geometry allow for these materials to manipulate mechanical wave propagation, producing band gaps at certain frequency ranges. The enhanced static and vibration properties of architected metamaterials make them ideal candidates for multi-functional purposes. In this paper, we take inspiration from the mass-efficient static behavior of different lattice geometries to fully explore the capabilities of a periodic and locally resonant metastructure design platform. We numerically study the influence of four different lattice topologies on the dynamic and static behavior of metastructures that combine a periodic lattice geometry with locally resonant inclusions. We analyze the influence of lattice geometry on band gap frequencies in terms of the lattice effective static properties. We show that vibration mitigation over a wide range of frequencies is achieved by tailoring the lattice geometry for constant unit cell mass and size. Specifically, by selectively placing material inside the unit cell, we achieve up to a 6-fold change of lower edge band gap frequency and up to an 8-fold change of normalized band gap width, for metastructures with low-density lattices. We introduce multi-functional performance parameters to evaluate the metastructures in terms of their effective static stiffness and band gap properties. These parameters can inform the design of tailored materials that have desired mechanical and dynamic properties for applications in e.g., aerospace and automotive components, and energy infrastructure.

show abstract

“…Metallic lattice materials have been studied, and their specific properties and energy absorption capabilities were examined and compared with traditional sandwich core materials [5][6][7][8][9]. Specifically, hollow metallic microlattice materials based on advanced microfabrication techniques exhibited promising potential for impact protection [10][11][12][13][14][15][16][17][18]. Additionally, lattice composites, which are hybrids of lattice structures and fiber composites, can yield superior specific properties and populate vacant spaces in low-density regions of materials property charts [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Yin

Liu

et al. 2017

Composite Structures

View full text Add to dashboard Cite

a b s t r a c tLattice truss reinforced honeycombs (LTRHs), termed honeytubes, were developed based on a hybrid design of micro-lattice truss and square honeycomb topologies. Carbon fiber reinforced composite and polymer LTRHs were fabricated using different manufacturing approaches. Out-of-plane compression tests were performed on the LTRHs, and the properties were compared with the conventional square honeycombs. The stiffness and strength values of composite LTRHs didn't surpass those of composite square honeycombs due to the manually induced defects. On the other hand, polymeric LTRHs with perfect geometries were stiffer and stronger than the corresponding polymeric square honeycombs. A parametric study of the buckling resistance was carried out via finite element analysis, and the results indicated that hollow lattice stiffens honeycombs and increases the resistance to buckling, while the specific properties of honeytubes depend on their geometrical parameters. Moreover, the crush force efficiency and specific energy absorption were greater than those of square honeycombs and hollow lattice. This work demonstrates that hybrid designs that capitalize on micro-topologies can populate vacant regions in mechanical property charts, and provide increased energy absorption as crushing protection structures.

show abstract

Hierarchical Polymer Microlattice Structures

Cited by 15 publications

References 17 publications

Mechanical Metamaterials and Their Engineering Applications

Mechanical Metamaterials and Their Engineering Applications

On the Interrelationship Between Static and Vibration Mitigation Properties of Architected Metastructures

Honeytubes: Hollow lattice truss reinforced honeycombs for crushing protection

Contact Info

Product

Resources

About